The ornamental design for a jewelrydisplaydevice, as shown and described.
FIG. 1 is a top perspective view of the jewelry display device;
FIG. 2 is a top plan view thereof;
FIG. 3 is a side view thereof; and,
FIG. 4 is a bottom plan view thereof.
The broken lines shown in the several drawing figures are for the purpose of illustrating portions of the jewelry display device and/or environment and form no part of the claimed design.